The media has been referencing this for years now, but the data don't show that there was any meaningful effect on a national level. Here [1] are CDC data on various childhood vaccines. Childhood DTP/MMR vaccination rates varied very little over the past 15 years and never fell below 94%. They actually hit a record high in 2019 right before COVID - of about 95% each. Now they're both at record lows (around 92%) and continuing to trend lower.
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